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====== Plant Resistance Genes in //Citrus// spp. against //Xanthomonas// Infection ======

Author: [[https://www.researchgate.net/profile/Cristina-Cameirao|Cristina Cameirão]]\\
Internal reviewer: [[https://www.researchgate.net/profile/Roland_Koelliker|Roland Kölliker]]\\
Expert reviewer: [[https://www.researchgate.net/profile/Paula-Martins-2|Paula Martins]]

====== Kumquat (//Fortunella margarita//) ======

===== Pathogen: //Xanthomonas citri// ssp. //citri// =====

==== Resistance gene: //FmFLS2-1// ====

=== Synonyms ===

//NA//
=== Source ===

Nagami kumquat (Shi //et al//., 2016).
=== Status (identified, mapped, cloned, sequenced) ===

Sequenced and cloned (Shi //et al//., 2016).
=== Molecular markers ===

//NA//
=== Brief description ===

Receptor of bacterial flagellin (Shi //et al//., 2016).

----

====== Mandarin (//Citrus reticulata//) ======

===== Pathogen: //Xanthomonas citri// ssp. //citri// =====

==== Resistance gene: //CrFLS2-2// ====

=== Synonyms ===

//NA//
=== Source ===

Sun Chu Sha mandarin (Shi //et al//., 2016).
=== Status (identified, mapped, cloned, sequenced) ===

Sequenced and cloned (Shi //et al//., 2016).
=== Molecular markers ===

//NA//
=== Brief description ===

Receptor of bacterial flagellin (Shi //et al//., 2016).

----

====== Pummelo (//Citrus maxima//) ======

===== Pathogen: //Xanthomonas citri// ssp. //citri// =====

==== Resistance gene: //CtNH1// ====

=== Synonyms ===

//NA//
=== Source ===

Pummelo (Chen //et al//., 2013).
=== Status (identified, mapped, cloned, sequenced) ===

Sequenced and cloned (Chen //et al//., 2013).
=== Molecular markers ===

//NA//
=== Brief description ===

//NPR1// homolog (Chen //et al//., 2013).

----

====== Orange (//Citrus sinensis//) ======

===== Pathogen: //Xanthomonas citri// ssp. //aurantifolii// =====

==== Resistance gene: //CsCAF1// ====

=== Synonyms ===

//NA//
=== Source ===

Sweet orange (Cernadas //et al//., 2008).
=== Status (identified, mapped, cloned, sequenced) ===

Identified (Cernadas //et al//., 2008) and cloned (Shimo //et al//., 2019).
=== Molecular markers ===

//NA//
=== Brief description ===

Citrus CAF1 homologue gene (Shimo //et al//., 2019); component of the citrus CCR4-NOT complex (Shimo //et al//., 2019).

----

===== Pathogen: //Xanthomonas citri// ssp. //citri// =====

==== Resistance gene: //CsMAF1// ====

=== Synonyms ===

//NA//
=== Source ===

Sweet orange (Soprano //et al//., 2013).
=== Status (identified, mapped, cloned, sequenced) ===

Cloned (Soprano //et al//., 2013).
=== Molecular markers ===

//NA//
=== Brief description ===

RNA polymerase III repressor (Soprano //et al//., 2013).

----

===== References =====

Cernadas RA, Camillo LR, Benedetti CE (2008). Transcriptional analysis of the sweet orange interaction with the citrus canker pathogens //Xanthomonas axonopodis// pv. //citri// and //Xanthomonas axonopodis// pv. //aurantifolii//. Mol. Plant Pathol. 9: 609-631. DOI: [[https://doi.org/10.1111/J.1364-3703.2008.00486.X|10.1111/J.1364-3703.2008.00486.X]]

Chen X, Barnaby J.Y., Sreedharan A, Huang X, Orbovic V. Grosser J.W., Wang N, Dong X, Song W (2013). Over-expression of the citrus gene CtNH1 confers resistance to bacterial canker disease. Physiol. Mol. Plant Pathol. 84: 115-122. DOI: [[https://doi.org/10.1016/j.pmpp.2013.07.002|10.1016/j.pmpp.2013.07.002]]

Shi Q, Febres VJ, Jones JB, Moore GA (2016). A survey for FLS2 genes from multiple citrus species identifies candidates for enhancing disease resistance to //Xanthomonas citri// ssp. //citri//. Hortic. Res. 3: 16022. DOI: [[https://doi.org/10.1038/hortres.2016.22|10.1038/hortres.2016.22]]

Shimo HM, Terassi C, Silva CCL, Zanella JL, Mercaldi GF, Rocco SA, Benedetti CE (2019). Role of the //Citrus sinensis// RNA deadenylase CsCAF1 in citrus canker resistance. Mol. Plant Pathol. 20: 1105-1118. DOI: [[https://doi.org/10.1111/mpp.12815|10.1111/mpp.12815]]

Soprano AS, Abe VY, Smetana JHC, Benedetti CE (2013). Citrus MAF1, a repressor of RNA polymerase III, binds the //Xanthomonas citri// canker elicitor PthA4 and suppresses citrus canker development. Plant Physiol. 163: 232-242. DOI: [[https://doi.org/10.1104/pp.113.224642|10.1104/pp.113.224642]]

----

===== Further reading =====

Canteros BI, Gochez AM, Moschini RC (2017). Management of Citrus canker in Argentina, a success story. Plant Pathol. J. 33: 441-449. DOI: [[https://doi.org/10.5423/PPJ.RW.03.2017.0071|10.5423/PPJ.RW.03.2017.0071]]

Fu H, Zhao M, Xu J, Tan L, Han J, Li D, Wang M, Xiao S, Ma X, Deng Z (2020). Citron C-05 inhibits both the penetration and colonization of //Xanthomonas citri// subsp. //citri// to achieve resistance to citrus canker disease. Hortic. Res. 7: 58. DOI: [[https://doi.org/10.1038/s41438-020-0278-4|10.1038/s41438-020-0278-4]]

Martins PMM, de Oliveira Andrade M, Benedetti CE, de Souza AA (2020). //Xanthomonas citri// subsp. //citri//: host interaction and control strategies. Trop. Plant Pathol. 45: 213-236. DOI: [[https://doi.org/10.1007/s40858-020-00376-3|10.1007/s40858-020-00376-3]]

----

===== Acknowledgements =====

This fact sheet is based upon work from COST Action CA16107 EuroXanth, supported by COST (European Cooperation in Science and Technology).
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